Detecting the Diurnal Cycle of Rainfall Using Satellite Observations
Detecting the Diurnal Cycle of Rainfall Using Satellite Observations
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DOI：
10.1175/1520-0450(1993)032
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发表时间：
1993-02
期刊：
影响因子：
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通讯作者：
T. Bell;N. Reid
中科院分区：
文献类型：
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作者：
T. Bell;N. Reid
摘要热带地区降雨的日变化周期因地区而异。确定这种变异性对于将大气模型的预测与真实的大气行为进行比较，以及确保低空卫星对总降雨量的估计不会因其对地球特定区域的观测不频繁而产生偏差都很重要。虽然目前还没有来自拟议的热带降雨测量使命（TRMM）卫星的数据可供使用，但鉴于卫星拟议的采样特点，我们可以问一下，当卫星最终收集数据时，对降雨日周期的探测效果如何。昼夜周期的数据分析进行了讨论，考虑到这一事实，卫星访问将不规则地间隔时间。前几个谐波的振幅将通过对卫星观测的最小二乘拟合来确定，并且建立拟合振幅的统计显著性所需的测试将通过对卫星观测的最小二乘拟合来确定。
Abstract The diurnal cycle in rainfall varies considerably from region to region in the tropics. Determining this variability is important both for comparing predictions of atmospheric models to real atmospheric behavior and for making sure that estimates of total rainfall from low-altitude satellites are not biased because of their infrequent observations of a given region of the earth. Although there are no data from the proposed Tropical Rainfall Measuring Mission (TRMM) satellite to work with yet, we can ask how well the diurnal cycle in rainfall will be detected when the satellite is eventually collecting data, given the satellite's proposed sampling characteristics. Data analyses for the diurnal cycle are discussed, taking into account the fact that the satellite visits will be irregularly spaced in time. The amplitudes of the first few harmonics will be determined by least-square fits to the satellite observations, and the tests needed to establish the statistical significance of the fitted amplitu...